$1,1$-dichloropropane is converted to propanal by reaction with aqueous sodium hydroxide through several stages. $\text{CH}_3\text{CH}_2\text{CHCl}_2 \xrightarrow{\text{NaOH(aq)}} \text{CH}_3\text{CH}_2\text{CHO}$ What is the name of the first step in this reaction?
- Aaddition
- Belimination
- Coxidation
- Dsubstitution